How much fish oil are you taking? I think the normal dose is a tablespoon, how much did you have to increase the dose?
Have you tried Cod Liver oil instead?
Are you taking any other vitamins regularly?
I would suggest focusing less on the "how much volume" and rather more on the "how much DHA & EPA". Dr. Rhonda Patrick suggest 4g per day though.
Personally I was doing 2 teaspoons during that time and continue to do so today - liquid version (they also make capsules).
As for Cod - it looks like Carlson Cod has DHA and EPA but I personally use the "Very finest fish oil" one.
The one thing according to Dr. Patrick is that the plant based versions just don't work the same.
How much fish oil are you taking? I think the normal dose is a tablespoon, how much did you have to increase the dose?
Have you tried Cod Liver oil instead?
Are you taking any other vitamins regularly?